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Explain a new potential heart medicine, code-named X-281, and is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill you are told that X-281 is a monoprotic weak acid, however because of security concerns, the actual chemical formula must remain top secret. The company is interested in the drug's Ka value for the reason that only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries.
To determine the pKa of X-281 you prepare a 0.095M test solution of X-281. The pH of the solution is determined to be 2.40. Explain what is the pKa of X-281?
Given 5.2 g of hydrobromic acid (48%) calculate the number of mL. (MW HBr: 80.91 g/mol, density: 1.49 g/mL) I am getting 1.675 but it is counting it wrong. Anyone else getting something different
According to the Balmer-Rydberg equation, transitions from n= 5 to m= 2 result in a photons of light that give rise to a spectral line with what color
Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.651kJ of heat. It shrinks on cooling, and the atmosphere does 384J of work on the balloon.
calcium phosphide reacts with water to produce calcium hydroxide and phosphine. a if you start with 15.0 g of calcium
if the pressure inside of the eudiometer is equalized to barometric pressure (0.987 atm), what is the pressure of the oxygen gas in the eudiometer?
Determine the work done by the evolution of H 2 in the subsequent reaction on the surrounding atmosphere with1atm pressure and at 25 degree celsius temperature and express your answer in Joule
Determine the values of q, w, and ΔE0rxn for this given chemical reaction at constant temperature and pressure?
What amount of solid NaOH must be added to 1.0 L of a 0.13 M H2CO3 solution to produce a solution with [H+]= 3.4×10-11 M ? There is no significant volume change as the result of the addition of the solid.
what is the maximum number of moles that fit in the channel of a processor chip that is 61.7 nm long, 86.6 nm wide and 595 nm thick. Assume that the atoms stack in a simple cubic arrangement.
For the reaction CO+O2 -> CO2 , what is the maximum amount of CO2 (44.0095 g/mol) which could be formed from 16.73 g of CO (28.0101 g/mol) and 0.251 mol of O2 (31.9988 g/mol)? Answer in units of mol
Consult your lecture or lab text and give a complete structuer for the 'intermediate borate ester' formed in the reduction of 2-butanone with NaBH4. Why is it necessary to add water after the reaction is complete?
you analyze 100 kg of a gas in a tank at atmospheric pressure and find the following: CO2: 19.3% N2:72.1% O2:6.5% H2O: 2.1% what is the average molecular weight of this gas
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